A family of Microsoft word processing software products for creating web, email, and print documents.
In Word for Windows, the nonprinting marks are the same color as the text. With the text color set to "Automatic," that usually means black color, and when the text is explicitly set to red (for example), the marks are red. See the screen shot below.
In Word for Mac, the nonprinting marks have a color which is different from that of the text, though.